Boot outsole



FIG. 1 is a front and left side perspective view of a boot outsole showing my new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is rear elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a left side elevational view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The dashed lines shown in the drawings are included for purposes of illustrating environmental structure. The dashed lines and structure they depict form no part of the claimed design. 

CLAIM The ornamental design for a boot outsole, as shown and described. 